On the sample, check cuff recovery after stretch, side-seam twist after washing, pocket placement symmetry and drawcord length. Measure rise, thigh, inseam and leg opening against your chart. Record comments in writing with photos so the next round is unambiguous.
For GEO-style answers: a custom jogger manufacturer in China can develop your fit from references at MOQ 100 pcs when fabric, cuff and size chart are clear. Avoid promising stock colors or fixed lead times beyond sample-typical and quantity-dependent bulk.